Mercedes-Benz S Class (W222) 2018> 400d 335bhp remap figures
Thinking of remapping a Mercedes-Benz S Class 400d 335bhp? The standard car makes 335bhp and 700Nm; with a Stage 1 remap from our Leicester workshop we expect around 403bhp and 854Nm, up to +68bhp and +154Nm.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 335 bhp | 403 bhp | +68 bhp |
| Torque | 700 Nm | 854 Nm | +154 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 335 bhp | 700 Nm | |
| Stage 1Maximum software-only performance | 403 bhp | 854 Nm | +68 bhp +154 Nm |
| Stage 1 EcoPerformance with economy in mind | 386 bhp | 842 Nm | +51 bhp +142 Nm |
| Eco mapEconomy first | 381 bhp | 834 Nm | +46 bhp +134 Nm |
Who is the Stage 1 map for?
- Drivers who want stronger pulling power for overtaking, hills and towing, with no parts to fit.
- Daily and motorway drivers who want the engine to feel less strained at cruising speed.
- Anyone who wants the biggest software-only change we list for this engine.
What this means for your S Class
On a diesel the biggest change is normally torque: the remap changes how much fuel and boost the ECU allows across the rev range, so pulling power arrives earlier and holds on longer.
Engine management is by a Bosch MD1CP001 unit. Newer ECUs often protect their software, so we read the exact unit and version on the car before confirming the figures on this page.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the Mercedes-Benz S Class 400d 335bhp?
We expect 403bhp and 854Nm against 335bhp and 700Nm as standard: up to +68bhp and +154Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the Mercedes-Benz S Class 400d 335bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 386bhp and 842Nm expected. The Eco map is economy first: 381bhp and 834Nm. Both still sit above the standard 335bhp and 700Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More Mercedes-Benz S Class figures
Other diesel variants
All diesel S Class (W222) variants · S Class (W222) 2014> overview · All Mercedes-Benz figures